Isotope-selective Ion trapping via sympathetic cooling using a surface-electrode trap with a hole for collimated...

Area of Science:

• Atomic, Molecular, and Optical Physics
• Quantum Information Science
• Materials Science and Engineering

Background:

• Surface-electrode ion traps are crucial for quantum computing and precision measurements.
• Efficient atomic loading and isotope selectivity are key challenges in ion trap experiments.
• Existing methods for ion loading can be complex or lack selectivity.

Purpose of the Study:

• To develop an improved surface-electrode ion trap for enhanced atomic loading and isotope selectivity.
• To demonstrate the selective trapping of specific ion isotopes using a novel through-hole design.
• To explore the potential of this trap for quantum applications and precision measurements.

Main Methods:

• Fabrication of a surface-electrode ion trap with a square through-hole using anisotropic etching of silicon.
• Introduction of an atomic beam through the through-hole for ion loading.
• Experimental demonstration of selective trapping of calcium isotope ions.
• Sympathetic cooling for preparing isotope ion pairs.

Main Results:

• Achieved enhanced isotope selectivity by introducing the atomic beam through the through-hole.
• Successfully demonstrated selective trapping of calcium isotope ions from an atomic oven.
• Prepared isotope ion pairs via sympathetic cooling in seconds, comparable to ablation loading.
• Demonstrated direct generation of an ion chain above the through-hole.

Conclusions:

• The novel through-hole design significantly improves atomic loading and isotope selectivity in ion traps.
• This method allows for efficient preparation of isotope ion pairs and ion chains.
• The simple experimental setup is suitable for various ion species and applications like quantum-charge-coupled-device (QCCD) architectures and precision isotope shift measurements.